package cn.z.ping;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Ping {
	public static Pattern pattern = Pattern.compile("(\\d+ms)(\\s+)(TTL=\\d+)", Pattern.CASE_INSENSITIVE);

	public static boolean ping01(String ipAddress) throws Exception {
		int timeOut = 10000;  //超时应该在3钞以上
		return InetAddress.getByName(ipAddress).isReachable(timeOut);
	}

	public static void ping02(String ipAddress) throws Exception {
		String line = null;
		try {
			Process pro = Runtime.getRuntime().exec("ping " + ipAddress);
			BufferedReader buf = new BufferedReader(new InputStreamReader(pro.getInputStream()));
			while ((line = buf.readLine()) != null) {
				System.out.println(line);
			}
		}
		catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
	}
	public static boolean ping(String ipAddress, int pingTimes, int timeOut) {
		BufferedReader in = null;
		Runtime r = Runtime.getRuntime();  // 将要执行的ping命令,此命令是windows格式的命令
		String pingCommand = "ping " + ipAddress + " -n " + pingTimes + " -w " + timeOut;
		try {   // 执行命令并获取输出
			System.out.println(pingCommand);
			Process p = r.exec(pingCommand);
			if (p == null) {
				return false;
			}
			// 逐行检查输出,计算类似出现=23ms TTL=62字样的次数
			in = new BufferedReader(new InputStreamReader(p.getInputStream()));
			int connectedCount = 0;
			String line = null;
			while ((line = in.readLine()) != null) {
				connectedCount += getCheckResult(line);
			}   // 如果出现类似=23ms TTL=62这样的字样,出现的次数=测试次数则返回真
			return connectedCount == pingTimes;
		}
		catch (Exception ex) {
			ex.printStackTrace();   // 出现异常则返回假
			return false;
		}
		finally {
			try {
				in.close();
			}
			catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	//若line含有=18ms TTL=16字样,说明已经ping通,返回1,否則返回0.
	private static int getCheckResult(String line) {  // System.out.println("控制台输出的结果为:"+line);
		Matcher matcher = pattern.matcher(line);
		while (matcher.find()) {
			return 1;
		}
		return 0;
	}
	public static void main(String[] args) throws Exception {
		String ipAddress = "127.0.0.1";
		System.out.println(ping01(ipAddress));
		//		ping02(ipAddress);
		//		System.out.println(ping(ipAddress, 5, 5000));
	}
}